iPhone app - message alert service

We have a membership based website using amember. Members have access to various members only websites that they subscribe to. Each of the members websites is an independent wordpress website. Attached two samples, one members area (after logging in) and the second screenshot of one of the membership sites. The iPhone app we need needs to allow the user to log in using their current username and password. Once logged in the members will have access to the alerts sent from the membership websites that they have subscribed to. (please see PDF for concept design and functions). IMPORTANT: - Need to keep user logged in, until user logs out - Show notification, with sound - ability to choose from the wordpress category (alerts or alerts + all posts) - if user is not active, once they log in there should be text letting the user know that their subscription has expired and that they need to re-subscribe (link to members site) I hope that this is clear, if you require more details please PM me. Thank you, Paul